<ion-header>
        <ion-navbar>
          <button ion-button menuToggle>
            <ion-icon name="menu"></ion-icon>
          </button>
          <ion-title>Hello Ionic</ion-title>
        </ion-navbar>
      </ion-header>
      
      <ion-content padding>
          <ion-list>
              <ion-item *ngFor="let items of semesterList; let i = index" (click)="chooseSemester(i)">
                  {{items}}
              </ion-item>
          </ion-list>
      </ion-content>